| 摘要 |
H:/AKW/Introvn/NRPortbl/DCC/AKW/5073085_I.DOC-9/09/2015 An eye treatment system for performing an ocular surgical procedure contains an eye treatment probe or handpiece, a treatment console, an eye treatment cassette, and a pump 5 formed by the engagement of the treatment cassette with the treatment console. The handpiece is configured to provide at least irrigation fluid to, and aspiration of fluid from, a subject eye. The treatment console comprises a controller configured to control the eye treatment probe. The eye treatment cassette engages the treatment console to couple the eye treatment probe with the treatment console. The pump comprises a pump head having 10 a plurality of projections disposed to rotate about an axis, a ramp disposed near the rotating projections, and a resilient channel configured to transfer fluid when engaged by the ramp and the plurality of projections. The ramp is configured to reduce pressure fluctuations with the eye during a surgical procedure and comprises and entrance portion, a central portion, and an exit portion. The ramp is configured such that the arcuate extent of the 15 entrance portion is unequal to the arcuate extent of the exit portion. I Al 50a 50b |
